Top 10 Best Diamond Testers Buying Guide & Reviews

A diamond tester is an electronic device used to determine whether a given object is made of diamond. It does this by comparing the electric conductivity of the material to that of a known diamond.

Which Are The Best Diamond Testers From Our Choice

If you don’t have enough time, check out this shortlist of the best diamond testers and choose the one you like the most.

10 Best Diamond Testers People Love In 2022: In Depth Features

SaleBestseller No. 1
HMKIS Diamond Tester Pen, High Accuracy Jewelry Diamond Tester+ 60X Mini LED Magnifying, Professional Diamond Selector for Novice and Expert, Thermal Conductivity Meter
  • [Easy to Use]: Real Diamond will Emits sounds and lights >=9.
  • [Intuitive Design]: Fake crystal, such as cubic zirconium ( CZ ), crystal, glass will be no sounds and lights <9.
  • [fast and safe ]: This diamond selector tester designed for quick, precise, and safe diamond testing. No harm to diamonds.
  • [Magnification]: 60X led Magnification with batteries ( Small microscope ). For Gems, Coins, Antiques, Stamps, Reading, Inspection etc.
  • [Note]: Please ensure that the battery temperature is higher than 10 ℃, can not test metal, save power
Bestseller No. 2
High Accuracy Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers)
  • [Fast and safe ]:Professional Diamond Selector II will indicate genuine diamond or fake.It is designed for quick, precise, and safe diamond testing.
  • [Intuitive Design]:LCD display & LED indicator.Uses large / small switches for testing diamonds,Emits audible sounds to easily differentiate the readings.
  • [Simple to Use]:Hqdz Diamond Tester Pen is simple to operate to get results, professional(s) are not required. Simply turn on our Diamond Tester Pen detector; place the tip of the Diamond Tester on the gem stone (lightly pressed is sufficient) and If the stone is fake, crystal or cubic zirconia, the tester will not beep.
  • [Package include]:Diamond tester is battery powered for convenience.Requires 1 standard 9v battery, which is included.Package include:1 x Diamond Tester,1 x Leather Pouch Case,1 x Testing Platform,1 x User Manual,1 x DC 9V battery.
SaleBestseller No. 3
Best Precision Jewelry Diamond Test Pen Environmentally Friendly 9V Battery, High Precision Jewelry Diamond Tester, Suitable for Novice and Expert, Thermal Conductivity Meter (Black)
  • Professional Diamond Selector II will show real diamonds or fakes,Use the big/small switch to test diamonds,Makes an audible sound to easily distinguish readings.
  • Easy to use:Real diamonds make sounds and lights >= 9.Fake crystal, such as cubic zirconia (CZ), crystal, glass will not emit sound and light <9.
  • Support battery: support mercury-free alkaline environment-friendly high-performance battery,DC 9V battery x 1 (included)
  • Fast and Safe: This diamond selector tester is designed for fast, precise and safe diamond testing. Harmless to diamonds.
  • Service: If you have any questions about the use, please contact us. We will explain the details. Professional equipment, the use method needs to be learned slowly.
Bestseller No. 4
Diamond Tester Pen+60X Mini LED Magnifying,High Accuracy Jewelry Diamond Tester Tool,Environmental Protection 9V Battery,Professional Diamond Selector for Novice&Expert,Thermal Conductivity Meter
  • ✔【Intuitive Design】Hqdz Diamond Tester Pen comes with LED lights and audio indication. During a test, if the stone tested is a diamond, the LED lights will light up as the stone passes each test conducted by the Diamond detector. Once our Diamond Tester Pen has completed all of its tests, the pen will make a beep sound as well as show a row of fully lite LED lights.
  • ✔【Simple to Use】Hqdz Diamond Tester Pen is simple to operate to get results, professional(s) are not required. Simply turn on our Diamond Tester Pen detector; place the tip of the Diamond Tester on the gem stone (lightly pressed is sufficient) and If the stone is fake, crystal or cubic zirconia, the tester will not beep. To determine the clarity of a diamond use 60X LED lighted Loupe, magnifying glasses.
  • ✔【Fast Results】Hqdz’s Diamond Tester Pen is design to deliver fast, accurate results. You will be able to know if something is fake in a matter of seconds.
  • ✔【Portable】Hqdz Diamond Tester Pen and 60X LED Lighted Loupe each comes with its own convenient carrying cases. Both items are small and can fit into any purse or backpack. Hqdz’s Diamond Tester Pen and 60X LED Lighted Loupe combo is a must have tool kit when you are going to a garage sale, flea market, swap meet, etc. Alternatively, its also a great tool to have when testing your own jewelry.
  • ✔【Application Range】Industrial Purpose, Circuit Board And Printing , Industry, Medicine, Gardening, Coin, Diamond,Stamp, Jewelry, Appraisal, Education, Geography, Home And Office.
Bestseller No. 5
Diamond Tester High Accuracy Diamond Tester Pen,Environmental Protection 9V Battery,Professional Diamond Selector for Jeweler Novice and Expert,Thermal Conductivity Meter (Diamond Tester)
  • ✔●Professional Diamond Selector II will indicate genuine diamond or fake,LCD display & LED indicator.
  • ✔●It is designed for quick, precise, and safe diamond testing.Emits audible sounds to easily differentiate the readings.
  • ✔●Portable electronic device for distinguishing real diamonds from other simulated stones.
  • ✔●If stone is Fake crystal, a simulant such as cubic zirconium ( CZ ), will be no reaction.
  • ✔●Came with 5-Year Warranty TAKE YOUR CHANCE !!Click the "ADD TO CART "Button Now!Thank You For Your Choice !Package Contents: 1 x Diamond Tester,1 x Use Manual,1 x 9v Battery ( included)
Bestseller No. 6
High Accuracy Diamond Tester+30X60X Illuminated Jewelry Eye Loupe Mini Led Foldable Magnifying,Jewelry Diamond Detector Gem Distinguish Tool Thermal Conductivity Meter for Novice and Expert
  • ✔【Intuitive Design】This gemstone testing equipment is not only a diamond tester, but also a multi gemstone tester. It can detect if a gemstone is real or fake, including: diamond, sapphire, ruby, crystal, agate, jadeite, and other precious stone of various sizes.
  • ✔【Simple to Use】Mollo Diamond Tester Pen is simple to operate to get results, professional(s) are not required. Simply turn on our Diamond Tester Pen detector; place the tip of the Diamond Tester on the gem stone (lightly pressed is sufficient) and If the stone is fake, crystal or cubic zirconia, the tester will not beep. To determine the clarity of a diamond use 30X60X LED lighted Loupe, magnifying glasses.
  • ✔【Portable】Mollo Diamond Tester Pen and 30X60X LED Lighted Loupe each comes with its own convenient carrying cases. Both items are small and can fit into any purse or backpack. Mollo’s Diamond Tester Pen and 30X60X LED Lighted Loupe combo is a must have tool kit when you are going to a garage sale, flea market, swap meet, etc. Alternatively, its also a great tool to have when testing your own jewelry.
  • ✔【Application Range】Industrial Purpose, Circuit Board And Printing , Industry, Medicine, Gardening, Coin, Diamond,Stamp, Jewelry, Appraisal, Education, Geography, Home And Office.
  • ✔☛ NOTICE: * No matter what gemstone you are testing, the probe needle and the tested object must be at a 90° angle. * When testing diamond, your right index finger must keep touching the metal panel on the back of the tester, while you do not touch the panel if you test other gemstones. * Do Not test any metal. * Do Not wear glove.
SaleBestseller No. 7
Presidium Multi Tester III (PMuT III) All-In-One Instrument for Testing Diamonds, Moissanites and Diamond Simulants
  • IMPORTANT TO NOTE: This product needs to be calibrated prior to use. If you experience issues with calibration, please reach out to the seller for assistance prior to returning the item.
  • EASY TO USE DESIGN: Ergonomic handheld design with a rubberized anti-slip grip for easy handling. Light and portable with a convenient carrying case.
  • THINNEST RETRACTABLE PROBE TIP: Retractable probe tip that ensures consistent pressure against the gemstone during testing for more reliable results. With the industry’s thinnest probe tip size of 0.6mm, the PMuT III tests colorless diamonds as small as 0.02ct.
  • CLEAR, CONVENIENT DISPLAY: 180-degree multi-viewing LED display for easy readability for either right or left-handed use
  • ALL-IN-ONE INSTRUMENT: The world’s first tester that tests for both colorless diamonds and moissanites in a single instrument. Powered by 3 AAA batteries.
SaleBestseller No. 8
StillCool Diamond Tester, High Accuracy Diamond Test Pen, Professional Jewelry Diamond Tester Tool
  • LCD display & LED indicator.
  • It is designed for quick, precise, and safe diamond testing.
  • Portable electronic device for distinguishing real diamonds from other simulated stones.
  • If stone is Fake crystal, a simulant such as cubic zirconium ( CZ ), will be no reaction.
  • Powered by DC 9V battery x 1 (Not Included)
SaleBestseller No. 9
HDE High Accuracy Professional Jeweler Diamond Tester For Novice and Expert,Diamond Selector II, L101
  • Professional Diamond Selector II will indicate genuine diamond or fake
  • Uses large / small switches for testing diamonds
  • Emits audible sounds to easily differentiate the readings
  • Diamond tester is battery powered for convenience
  • Requires 1 standard 9v battery, which is not included
Bestseller No. 10
Diamond Tester Pen, High Accuracy Jewelry Diamond Tester+200g/0.01g Mini Jewelry Scale+60X Mini LED Magnifying, Professional Diamond Selector for Novice and Expert, Thermal Conductivity Meter
  • This gemstone testing equipment is not only a diamond tester, but also a multi gemstone tester. It can detect if a gemstone is real or fake, including: diamond, sapphire, ruby, crystal, agate, jadeite, and other precious stone of various sizes.
  • Simple to Use Diamond Tester Pen is simple to operate to get results, professional(s) are not required. Simply turn on our Diamond Tester Pen detector; place the tip of the Diamond Tester on the gem stone (lightly pressed is sufficient) and If the stone is fake, crystal or cubic zirconia, the tester will not beep. reads weights of adiamond use 200g/0.01g Mini Jewelry Scale, To determine the clarity of a diamond use 60X LED lighted Loupe, magnifying glasses.
  • This pocket scale has 200 gram max weight capacity and reads weights in increments of 0.01g. High precision sensors make sure the accuracy. 6 weigh modes available - g/ oz/ gn/ ct/ dwt/ ozt.Tare & Auto-off: You can use the tare function to zero the weight of container within 200g. Energy saving by 3 minutes auto-off function.
  • Portable Diamond Tester Pen and 60X LED Lighted Loupe each comes with its own convenient carrying cases. Both items are small and can fit into any purse or backpack. Diamond Tester Pen and 60X LED Lighted Loupe combo and 200g/0.01g Mini Jewelry Scal is a must have tool kit when you are going to a garage sale, flea market, swap meet, etc. Alternatively, its also a great tool to have when testing your own jewelry.
  • Application Range:Industrial Purpose, Circuit Board And Printing , Industry, Medicine, Gardening, Coin, Diamond,Stamp, Jewelry, Appraisal, Education, Geography, Home And Office.fast and safe This diamond selector tester designed for quick, precise, and safe diamond testing. No harm to diamonds. If you have any questions about use, please contact us. We will explain in detail. Professional equipment, the use method needs to learn slowly.

Criteria You Should Consider Before Purchasing The Best Diamond Testers

Not every diamond testers comes with the same specifications & price. So, you should choose the one that will serve your purpose and save your wallet.

When buying a diamond testers, it is important to consider the quality of the diamonds being tested and the testing process itself. Some of the most common types of diamond testers are those that use a light or a naked eye to determine the quality of the diamond. Other types of testers include those that use a microscope to determine the size and shape of the diamond.

Related Frequently Asked Questions

What Stones Will Pass A Diamond Tester?

The diamond tester will only be able to test diamonds that are at least two carats in size.

What Is A Good Diamond Tester To Buy?

There is no one perfect diamond tester, as different testers will have different strengths and weaknesses. Some good options for buying a diamond tester include a manometer, or an object that can be rotated to measure the changes in temperature as diamonds are cut.

Are Diamond Testers Legit?

There is no one answer to this question as each person has their own opinion on whether diamond testers are legit or not. Some people believe that diamond testers are a reliable way to test the quality of a diamond, while others may not believe that they are worth the money. Ultimately, it is up to the individual to decide if they believe that diamond testers are worth the investment.

What Do Diamond Testers Detect?

Diamond testers detect the presence of diamonds inside or outside the item being tested.

Conclusion

There is no one definitive way to determine the quality of a diamond, as different laboratories have different methods and standards. Some of the best diamond testers include 25-carat diamonds, full-toothed diamonds, and prongs.

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